How to Add Custom Filters to Administrate Dashboards

Administrate is one of my favorites Rails gems.It gives you a CRUD interface for your entire database in seconds.This means any admin user can log in and get access to our database records from the browser. They can create, read, update, or delete data without having to write any code, scripts, or SQL. (Don't worry you can limit which tables can be updated or deleted too.)One problem is Administrate doesn't come with any kind of filtering and it can be hard to find specific records or records that meet certain conditions. You can sort columns alphabetically but when you have large sets of data this really doesn't help much.